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fzus63 kmqt 221352
glfls 
070 

open lake forecast for lake superior
national weather service marquette mi
952 am edt sun oct 22 2017

for waters beyond five nautical miles of shore on lake superior

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...a 29.8 inch trough is sweeping across lake superior 
today and will dissipate as it continues eastward tonight. a new 
low pressure trough of 29.5 inches moving across south central 
canada and the northern plains tonight will weaken and reach 
central lake superior monday afternoon at 29.7 inches. the trough
will then give way to low pressure of 29.5 inches organizing over
the ohio valley on monday. this low will deepen to 29.1 inches as
it lifts north to near drummond island by tuesday morning. as the
low then weakens to 29.4 inches while tracking toward james bay 
tuesday night, a 29.5 inch trough will linger back across the 
upper great lakes. the trough will drop south on wednesday as a 
ridge of 29.8 inches builds southeast into northern ontario. a 
29.5 inch trough will then move out across the plains states on 
thursday.

lsz162-222200-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
952 am edt sun oct 22 2017 /852 am cdt sun oct 22 2017/

.rest of today...southwest winds 20 to 30 knots diminishing to
15 to 25 knots late. waves 3 to 6 feet occasionally to 8 feet. 
.tonight...southwest winds 15 to 25 knots increasing to 20 to
30 knots after midnight. isolated showers after midnight. waves
subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.monday...southwest winds 15 to 25 knots veering west late. a
slight chance of showers. waves subsiding to 2 to 4 feet. 
.monday night...northwest winds 20 to 30 knots becoming north
gales to 35 knots after midnight. a chance of showers. waves
building to 5 to 8 feet occasionally to 10 feet. 
.tuesday...north gales to 35 knots diminishing to 20 to 30 knots
by mid afternoon. a chance of rain showers. waves building to
6 to 9 feet occasionally to 11 feet, then subsiding to 4 to
7 feet occasionally to 9 feet. 
.tuesday night...northwest winds 20 to 30 knots diminishing to
10 to 20 knots after midnight. a chance of rain showers after
midnight. waves subsiding to calm to 2 feet. 
.wednesday...north winds 10 to 20 knots veering southeast. a
chance of rain showers. waves building to 1 to 3 feet. 
.thursday...southeast winds 15 to 25 knots becoming northwest
20 to 30 knots. a chance of rain showers. waves building to 3 to
6 feet occasionally to 8 feet. 

$$
fzus63 kmqt 221352
glfls 

lsz263-222200-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
952 am edt sun oct 22 2017

.rest of today...southwest winds 20 to 30 knots diminishing to
15 to 25 knots late. isolated showers. waves 4 to 8 feet
occasionally to 10 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet. 
.tonight...southwest winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.monday...southwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon, then veering west late. a chance of
showers. waves subsiding to 2 to 4 feet. 
.monday night...northwest winds 15 to 25 knots becoming north
gales to 35 knots after midnight. a chance of showers. waves
building to 5 to 8 feet occasionally to 10 feet. 
.tuesday...north gales to 40 knots. a chance of rain showers.
waves building to 7 to 11 feet occasionally to 14 feet. 
.tuesday night...north winds 20 to 30 knots diminishing to 10 to
20 knots after midnight. waves subsiding to 2 to 4 feet. 
.wednesday...north winds 5 to 15 knots veering southeast. waves
subsiding to calm to 2 feet. 
.thursday...southeast winds 15 to 25 knots becoming north 20 to
30 knots. rain showers. waves building to 4 to 7 feet
occasionally to 9 feet. 

$$

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